CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity [Abstract]
Issuance of common stock (in shares)	1,148	2,327	92,422	86,491
Issuance of common stock purchased under the employee stock purchase plan (in shares)	1,857	2,106	3,569	4,035
Forfeiture of common stock (in shares)	580	4,418	1,023	5,121
Cash dividend (in dollars per share)			$ 0.89	$ 0.82
Purchase of common stock (in shares)	13,719	5,626	82,600	75,397